The neighborhood of Bay Ridge, in southern Brooklyn, isn’t exactly known for cool loft spaces. But this 850-square-foot, two-bedroom pad, at the cooperative 307 72nd Street, might be mistaken for being in Williamsburg. It has high vaulted ceilings with skylights, multiple exposures, exposed brick, and a lofted home office. A large private roof deck is the icing on the cake. And it’s definitely cheaper than any two-bedroom in Williamsburg: while the apartment was last listed for $359,000 in 2012, it is now asking $485,000.